Wordnet 3.0
ADVERB (1)
1.
without sleep;
in a sleepless manner;
- Example: "he was lying in bed sleeplessly"
The Collaborative International Dictionary of English v.0.48:
Sleepless \Sleep"less\, a.
1. Having no sleep; wakeful.
[1913 Webster]
2. Having no rest; perpetually agitated. "Biscay's sleepless
bay." --Byron.
[1913 Webster] -- Sleep"less*ly, adv. --
Sleep"less*ness, n.
[1913 Webster]
WordNet (r) 3.0 (2006):
sleeplessly
adv 1: without sleep; in a sleepless manner; "he was lying in
bed sleeplessly"